#!/usr/bin/env ruby -w

require 'pathname'
require 'fileutils'

unless ARGV.size == 2
  abort 'Usage: ruby music.rb google_folder_route new_folder'
end


def copy(path = @from)
  if path.file?
    copy_song(path)
    return true
  end

  path.children.each do |directory|
    copy(directory)
  end
end

def copy_song(song_path)
  destination = @to.realpath + song_name(song_path)
  FileUtils.copy(song_path, destination)
  puts "Copied: #{destination}"
end

def song_name(path)
  "#{author(path)} - #{title_song(path)}"
end

def author(path)
  author = path.parent.sub("#{@from}/", "")
  author.dirname.to_s == "." ? author : author.dirname
end

def title_song(path)
  title = path.basename.to_s
  title[3, title.size]
end

begin
  @from = Pathname.new(ARGV[0])
  @to = Pathname.new(ARGV[1])

  copy
end